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MQSeries.net Forum Index » General IBM MQ Support » QUEUE FOLDER IN QMGR DATA DIREECTORY

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dextermbmq
PostPosted: Tue Sep 16, 2014 9:54 pm    Post subject: QUEUE FOLDER IN QMGR DATA DIREECTORY Reply with quote

Voyager

Joined: 26 Jul 2014
Posts: 77
Hi All,

I am a bit short of information on the content of the files in

/var/mqm/qmgrs/<QMGRNAME>/queues directory

As far as i know any queue created on the queuemanager will have a corresponding file in this directory.. But what is the content of this file?

Will it store the persistant messages that have not been committed by application picking messages from this queue?

If yes then afterthe time of disaster can we reinstate these uncommitted messages on the queue using this file just like we use transaction logs?
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JosephGramig
PostPosted: Wed Sep 17, 2014 4:18 am    Post subject: Reply with quote

Grand Master

Joined: 09 Feb 2006
Posts: 1244
Location: Gold Coast of Florida, USA
First, the content of this file is meant only for the Qmgr to work with. All messages that are not in memory are on this queue that are committed unless they are non-persistent msgs, in which case they would only be on this queue if flushed from memory (for space reasons).

To recover messages on any queue, you must use linear logs which you must specify when you create the Qmgr and you cannot change that choice after creation of the Qmgr (you have to delete and recreate it).

So, if you are using circular logging and you end up with a damaged queue object, all messages on that queue are lost.
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